# Commutative Merge

> The requirement that concurrent updates merge in any order to the same result.

Record: `lexicon:commutative-merge`
Kind: constraint
Layer: [Causality Core](https://banes-lab.com/records/layer/causality-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-commutative-merge

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Wall-Clock-Correlated Causal Order](https://banes-lab.com/records/lexicon/wall-clock-correlated-causal-order.md) and before [Conflict-Free Replica Convergence](https://banes-lab.com/records/lexicon/conflict-free-replica-convergence.md).

## Category

- [Causality / Ordering / Distributed Time](https://banes-lab.com/records/lexicon-category/causality-ordering-distributed-time.md)

## Required by

- [CRDTs](https://banes-lab.com/records/architecture/crdts.md)

## Linked from

- [Causality / Ordering / Distributed Time](https://banes-lab.com/ontology/principles/architecture-category-causality-ordering-distributed-time.md)